I've gone through the topic on "Associating your app with the camera" for this updated document. However, there is not much different from the previous one regarding about the association of camera device app with the external USB camera device using the
Device Metadata Authoring Wizard.

I did uninstall the webcam through the device manager. After the uninstallation, I copy my device metadata file "d52454ce-7d4d-4298-88a1-0cfb600254f8.devicemetadata-ms" into the "C:\ProgramData\Microsoft\Windows\DeviceMetadataStore\en-US" folder and
then plug in my webcame device. The OS seems aware of the present of my device metadata file as shown in the following screenshot:

- Yes, there are two device metadata files("b60dcb2a-0713-4c76-912b-e00c7a31d5b1.devicemetadata-ms" and "50a6876f-207d-4051-b0ac-d3878f898411.devicemetadata-ms") with different hardware IDs targeted for two different models of camera device.

- The WebcamExtensionCPP sample app able to launch from Start menu.

- I'm using the bundled Camera app as well as the Camera Capture UI sample app to invoke the
More camera option but all showing the default option UI instead of the one provided by the WebcamExtensionCPP sample app.